E-Flex Micro Fiber Stronger concrete. Faster Projects. lower impact. Which Fiber Is Right for Your Job? E-Flex 250 Micro Fiber Designed for smooth finishes and smaller pours requiring flow and surface precision. Perfect for: Grout mixes Precast 3D 3D printing Overlays Decorative Concrete Length: 9.5mm to 25mm Available in dose bags or bulk. E-Flex 500 Micro Fiber Adds structural strength and moisture control, replacing or reducing welded wire mesh in some designs. Perfect for: Slab-on-grade Pavement Decks Thin Overlays Length: 25mm to 58mm Available in dose bags or bulk. E-Flex Micro Fiber Micro Fiber Description: E-Flex Micro Fiber fibers reduce plastic shrinkage and cracking in many concrete applications. Enhance concrete’s durability and extend its lifespan, while reducing visible cracks. Recycled fiber strands range in length from 9.5 mm to 58 mm. Available in bulk bags (~1,000 lbs) and alternate packaging upon request. Key Benefits: Reduces plastic shrinkage Improves surface durability Made from 100% recycled materials Can help lower embodied carbon Excellent workability Great finishing characteristics – no fibers sticking up at the surface Even distribution in the mix Flows easily through the pump, especially small pump applications Compatible with new cement and cementitious material Applications: Grout mixes Precast 3D printing Overlays Decorative Concrete Slab-on-grade Pavement Decks Gallery Image Gallery Image Gallery Image Download Safety Data Sheet E-Flex™ Recycled Reinforcement Fiber for Smarter, Faster Concrete Construction. Engineered for Strength, Workability, and Sustainability Build faster. spend less. Reduce Labor. E-Flex fibers from REGEN Fiber offer performance that helps you finish faster, reduce labor, and build stronger, while cutting your carbon footprint with a sustainability profile no other reinforcement material can match. Made from 100% recycled wind turbine blades, our concrete reinforcement fibers are engineered to prevent early cracking, improve durability, and reduce the need for extra handling time. With outstanding workability and zero compromise in appearance, E-Flex fibers help your crews pour more efficiently with strong mechanical properties that make them ideal for a wide range of ready-mix, precast concrete and composites applications. Whether you’re building a fulfillment center, regional airport, or data infrastructure facility, E-Flex 250 and 500 micro fibers deliver proven performance with third-party verified EPDs to support LEED v5, embodied carbon reporting, green procurement, compliance and ESG requirements, that help you meet specs, hit sustainability goals, and avoid costly delays Why concrete experts prefer e-flex Speeds Up Construction Get on to the next pour, and to occupancy, faster. E-Flex fibers can help reduce or even replace wire mesh and eliminate extra curing steps. All without affecting concrete strength or appearance. Avoid Costly Cracks and rework Both E-Flex 250 and E-Flex 500 micro fibers reduce plastic shrinkage and early-stage cracking especially in hot or dry conditions, by retaining internal moisture, releasing it slowly over time – aiding hydration, and enhanced freeze-thaw resistance and surface durability improving concrete longevity and minimizing callbacks. Lower Labor, Lower Hassle E-Flex fibers distribute evenly in the mix, with no balling, clumping, or floating. Potentially less mesh to install or trip hazards to manage. Compatible with standard concrete mix designs and cementitious systems, flowing smoothly through pumps with no compromise in broom finish or surface appearance. Sustainability Mandates Met EPD certified, with full EPDs across all fiber types, you can show measurable carbon reductions and meet requirements for LEED, state Buy Clean policies, EC3, ESG procurement, and carbon disclosure. Made IN THE USA tariff-free and supply-Ready E-Flex is produced in Iowa, 100% recycled, using U.S. and global materials — meaning you avoid import delays and compliance headaches. Full documentation, testing results, and submittal support available. In stock and ready to ship now. What contractors Are saying “You couldn’t tell the fibers were there after it was broomed, cured and saw cut. I definitely prefer using REGEN Fiber concrete fibers compared to steel fibers” “I would definitely use REGEN Fiber’s [concrete reinforcement] fibers again, as they provide an environmentally friendly substitution for polypropylene fibers." “We love the environmental story REGEN Fiber allows us to tell.” Built to perform And finish beautifully Our technical team works to determine ideal dosage and ensure code compliance Excellent pumpability and flow Great finishing – no fibers sticking up Enhances internal curing for better long-term strength May reduce moisture-related delays or cracking Works with standard concrete mixing equipment E-Flex 250: Typically used at 0.5–1.5 lb/yd³ depending on application E-Flex 500: Used at 3–15 lb/yd³ based on desired performance Both fiber types available in bulk bags (~1,000 lbs) Alternate packaging available on request Let’s Talk Project Success We’ll help you select the best E-Flex fiber for your project and get you a quote that includes freight and technical support. Or explore more in our Knowledge Center for test results, sustainability data, and downloadable specs. Downloads & Specs Safety Data Sheet – E-Flex 250 Safety Data Sheet – E-Flex 500
“You couldn’t tell the fibers were there after it was broomed, cured and saw cut. I definitely prefer using REGEN Fiber concrete fibers compared to steel fibers”
“I would definitely use REGEN Fiber’s [concrete reinforcement] fibers again, as they provide an environmentally friendly substitution for polypropylene fibers."
